CN117060566A - AC/DC hybrid micro-grid system - Google Patents
AC/DC hybrid micro-grid system Download PDFInfo
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- CN117060566A CN117060566A CN202311070034.3A CN202311070034A CN117060566A CN 117060566 A CN117060566 A CN 117060566A CN 202311070034 A CN202311070034 A CN 202311070034A CN 117060566 A CN117060566 A CN 117060566A
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- 238000004146 energy storage Methods 0.000 claims abstract description 19
- 238000010248 power generation Methods 0.000 claims description 28
- 238000004804 winding Methods 0.000 description 12
- 230000009977 dual effect Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The embodiment of the application provides an alternating current-direct current hybrid micro-grid system, which comprises: i section 400V alternating current bus, II section 400V alternating current bus, 750V direct current bus, first station are used to become, second station are used to become, energy storage battery and data center. The I section 400V alternating current bus and the II section 400V alternating current bus are connected and then connected with a data center, or the 750V direct current bus is connected with the data center. The I section 400V alternating current bus, the II section 400V alternating current bus and the 750V direct current bus are all connected with the energy storage battery. The first station is connected with the I section 400V alternating current bus by a transformer, and the second station is connected with the II section 400V alternating current bus by a transformer. The I section 400V alternating current bus and the II section 400V alternating current bus are both first main power supplies of the data center, the 750V direct current bus is a first standby power supply of the data center, and the energy storage battery is an uninterruptible power supply of the micro-grid system. Therefore, when the first main power supply fails, the first standby power supply bears the power supply required by the normal operation of the data center, and the power supply reliability of the micro-grid system is improved.
Description
Technical Field
The embodiment of the application relates to the field of miniature power supply systems, in particular to an alternating current-direct current hybrid micro-grid system.
Background
The micro-grid system is a small power generation and distribution system formed by integrating a distributed power supply, an energy storage device, an energy conversion device, related loads and a monitoring and protecting device. The micro-grid system can be divided into an alternating current micro-grid system, a direct current micro-grid system and an alternating current/direct current hybrid micro-grid system according to the different grid structures and power supply characteristics of the alternating current micro-grid and the direct current micro-grid.
The AC/DC hybrid micro-grid system comprises an AC bus and a DC bus, combines the advantages of the AC micro-grid system and the DC micro-grid system, and has the advantages of less power electronic conversion links, low energy loss, flexible load configuration and the like.
With the development of related technologies of micro-grid systems, the requirements of the power supply reliability of the systems are continuously improved. In the prior art, the power requirements of data centers are typically provided by the installation of batteries. However, if the battery fails, the ac/dc hybrid micro-grid system cannot work normally.
Disclosure of Invention
In view of the above problems, the embodiments of the present application provide an ac/dc hybrid micro-grid system, which overcomes or at least partially solves the problem of low power supply reliability of the ac/dc hybrid micro-grid system.
The embodiment of the application provides an alternating current-direct current hybrid micro-grid system, which comprises: i section 400V alternating current bus, II section 400V alternating current bus, 750V direct current bus, first station are used to become, second station are used to become, energy storage battery and data center. The 750V direct current bus is connected with the data center, or the I section 400V alternating current bus and the II section 400V alternating current bus are connected with the data center. The I section 400V alternating current bus, the II section 400V alternating current bus and the 750V direct current bus are all connected with the energy storage battery. The first station is connected with the I section 400V alternating current bus by a transformer, and the second station is connected with the II section 400V alternating current bus by a transformer. The I section 400V alternating current bus and the II section 400V alternating current bus are both first main power supplies of the data center, the 750V direct current bus is a first standby power supply of the data center, and the energy storage battery is an uninterruptible power supply of the micro-grid system.
In this embodiment, the first main power supply is provided for the data center through the i-section 400V ac bus and the ii-section 400V ac bus, and the first standby power supply is provided for the data center through the 750V dc bus, so that the data center can realize the power supply modes of ac/dc dual power supply, ac/dc dual line and ac/dc dual access. When the first main power supply fails, the first standby power supply can timely bear the power supply required by the normal operation of the data center, and the power supply reliability in the AC/DC hybrid micro-grid system is improved. And the energy storage battery is an uninterruptible power supply of the AC/DC hybrid micro-grid system, and can provide emergency power supply, so that the power supply in the AC/DC hybrid micro-grid system is stable and uninterrupted, and the power supply reliability in the AC/DC hybrid micro-grid system is further improved.
In an alternative, the microgrid system further comprises a 10kV alternating current bus and a 10kV off-site power supply, the first site being connected to the 10kV alternating current bus and the second site being connected to the 10kV off-site power supply. The first station-use transformer and the second station-use transformer are mutually standby.
In this embodiment, the first station transformer and the second station transformer are respectively connected to the 10kV ac bus and the 10kV external power supply, and the two station transformers are simultaneously electrified and operated in a split manner, so that it is possible to prevent one station from being out of operation due to a fault and reducing the power supply reliability.
In an alternative, the first station transformer and the second station transformer are both split transformers.
In this embodiment, when a fault occurs, the split transformer can limit short-circuit current, and when a load or power source connected to one low-voltage winding fails, the other low-voltage windings can still operate normally.
In an alternative manner, the micro-grid system further comprises: and the direct current-to-direct current converter is connected with the 750V direct current bus and converts a direct current 750V power supply provided by the 750V direct current bus into a direct current 240V power supply.
In this embodiment, the direct current 750V power supply provided by the 750V direct current bus is converted into the direct current 240V power supply, so that the direct current lighting system or the direct current charging pile in the micro-grid system can be powered.
In an alternative manner, the micro-grid system further comprises: a photovoltaic power generation unit. The photovoltaic power generation unit is connected with the 750V direct current bus, and the photovoltaic power generation unit is a second main power supply of the 750V direct current bus. The photovoltaic power generation unit is also connected with the data center, and is a second standby power supply of the data center.
In this embodiment, the photovoltaic power generation unit may be used as the second main power supply of the 750V dc bus and the second standby power supply of the data center, so that the power supply reliability in the ac/dc hybrid micro-grid system may be further improved.
In an alternative manner, the micro-grid system further comprises: a wind power generation unit. The wind power generation unit is connected with the 750V direct current bus, and the wind power generation unit is a third main power supply of the 750V direct current bus.
In an alternative manner, the micro-grid system further comprises: the wind power generation unit is connected with the 750V direct current bus through the alternating current-to-direct current converter.
In an optional mode, the micro-grid system further comprises a change-over switch, wherein the I section 400V alternating-current bus and the II section 400V alternating-current bus are connected and then connected with the data center through the change-over switch, or the 750V direct-current bus is connected with the data center through the change-over switch, and the change-over switch is used for selecting a first main power supply or a first standby power supply to supply power for the data center.
In an alternative, the first backup power source is in a hot standby state.
In an alternative, the 750V dc bus takes the form of a monopolar dc bus connection.
The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present application can be more clearly understood, and the following specific embodiments of the present application are given for clarity and understanding.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an ac/dc hybrid micro-grid system according to some embodiments of the present application.
Reference numerals:
101. i section 400V alternating current bus; 102. a section II 400V alternating current bus; 103. 750V direct current bus; 104. a first station; 105. a second station; 106. an energy storage battery; 107. a data center; 108. a change-over switch; 109. 10kV alternating current bus; 110. 10kV off-site power supply; 111. a photovoltaic power generation unit; 112. a wind power generation unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The terms "comprising" and "having" and any variations thereof in the description and claims of the application and in the description of the drawings are intended to cover and not exclude other matters. The word "a" or "an" does not exclude the presence of a plurality.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Furthermore, the terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to improve one or more of these features either explicitly or implicitly.
In the description of the present application, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as a "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., as a fixed connection, e.g., via a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. "connected" or "connected" of circuit structures may refer to physical connection, electrical connection or signal connection, for example, direct connection, i.e. physical connection, or indirect connection through at least one element in the middle, so long as circuit communication is achieved, or internal communication between two elements; signal connection may refer to signal connection through a medium such as radio waves, in addition to signal connection through a circuit. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
At present, the test point engineering of the intelligent energy station is continuously developed in the provinces of Shanghai, jiangsu, hunan, henan and the like to respond to the construction of the intelligent city. The intelligent energy station is an important component for building the ubiquitous electric power Internet of things of the national power grid by integrating the functions of a transformer substation, a data center station, a comprehensive energy station (comprising an energy storage station, an electric vehicle charging station and distributed photovoltaics) and the like. The intelligent energy station can integrate energy sources, data streams and service streams, improves comprehensive efficiency benefits of the power grid, and meets comprehensive requirements of urban construction on energy sources and environments.
The AC/DC hybrid micro-grid system is an important auxiliary facility of the intelligent energy station and is the basis of safe and stable operation of the intelligent energy station. It is worth pointing out that one of the main principles of designing an ac/dc hybrid micro-grid system is to ensure the power supply reliability of the ac/dc hybrid micro-grid system. However, in the prior art, the power supply reliability of the ac/dc hybrid micro-grid system is still in need of improvement.
In view of this, an embodiment of the present application provides an ac/dc hybrid micro-grid system, and fig. 1 is a schematic diagram of an ac/dc hybrid micro-grid system according to some embodiments of the present application. As shown in fig. 1, the ac/dc hybrid micro-grid system provided in this embodiment includes: a section I400V AC bus 101, a section II 400V AC bus 102, a section 750V DC bus 103, a first station transformer 104, a second station transformer 105, an energy storage battery 106 and a data center 107.
The I-stage 400V alternating current bus 101 and the II-stage 400V alternating current bus 102 are connected and then connected with the data center 107, or the 750V direct current bus 103 is connected with the data center 107. The I section 400V alternating current bus 101, the II section 400V alternating current bus 102 and the 750V direct current bus 103 are connected with the energy storage battery 106. The first station is connected to the section I400V AC bus 101 by the transformer 104, and the second station is connected to the section II 400V AC bus 102 by the transformer 105. The I-stage 400V alternating current bus 101 and the II-stage 400V alternating current bus 102 are both first main power supplies of the data center 107, the 750V direct current bus 103 is first standby power supplies of the data center 107, and the energy storage battery 106 is an uninterruptible power supply of the micro-grid system.
The station transformer is a power transformer for a power distribution station, and the energy storage batteries 106 may be a plurality of, for example, two energy storage batteries 106 shown in fig. 1, and the data center 107 is responsible for supplying power to systems such as an air conditioner, a fan, illumination, various computer loads, a server, and the like.
In some embodiments, referring to fig. 1, the ac/dc hybrid micro-grid system provided in this embodiment further includes a switch 108, where the i-stage 400V ac bus 101 and the ii-stage 400V ac bus 102 are connected to the data center 107 through the switch 108, or the 750V dc bus 103 is connected to the data center 107 through the switch 108, and the switch 108 is used to select a first main power supply or a first standby power supply to supply power to the data center 107. For example, the switch 108 may be automatic, and when the first primary power source fails, the switch 108 may automatically switch to enable the first backup power source to power the data center 107. For example, as shown in FIG. 1, the switch 108 selects the first primary power source to power the data center 107. It should be noted that, the switch 108 may not only implement electrical blocking of the first main power supply or the first standby power supply, but also implement mechanical blocking, so as to ensure that the two power supplies of the first main power supply or the first standby power supply can be switched safely and reliably.
In practical applications, the first standby power supply may be in a hot standby state. Generally, the state of the electrical equipment can be classified into four states of an operating state, a hot standby state, a cold standby state, and an inspection state. In this embodiment, the first standby power source being in the hot standby state refers to a state in which the first standby power source has operating conditions and can be switched to the power supply state by a switching operation of the switch 108.
Because the first standby power supply is in a hot standby state, if the first main power supply fails, the first standby power supply can timely enter a state of supplying power to a data center so as to improve the power supply reliability of the AC/DC hybrid micro-grid system.
In this embodiment, the first main power supply is provided for the data center 107 through the i-section 400V ac bus 101 and the ii-section 400V ac bus 102, and the first standby power supply is provided for the data center 107 through the 750V dc bus 103, so that the data center 107 can realize the power supply modes of ac/dc dual power supply, ac/dc dual line and ac/dc dual access, and when the first main power supply fails, the first standby power supply can timely bear the power supply required by the normal operation of the data center 107, thereby improving the power supply reliability in the ac/dc hybrid micro-grid system. In addition, the energy storage battery 106 is an uninterruptible power supply of the ac/dc hybrid micro-grid system, and can provide emergency power supply, so that the power supply in the ac/dc hybrid micro-grid system is stable and uninterrupted, and the power supply reliability in the ac/dc hybrid micro-grid system is further improved.
In some embodiments, to prevent one of the two stations from being out of operation due to a fault and reduce the power supply reliability, the two stations may be operated in parallel with each other, and in this case, the ac/dc hybrid micro-grid system provided in this embodiment may further include a 10kV ac bus 109 and a 10kV off-site power supply 110. The first station transformer 104 is connected to a 10kV alternating current bus 109, and the second station transformer 105 is connected to a 10kV off-station power supply 110. The first station-use transformer 104 and the second station-use transformer 105 are station-use transformers that are mutually standby.
In practice, the first station transformer 104 and the second station transformer 105 may each be split transformers.
Split transformers refer to multi-winding power transformers that are made up of one high voltage winding and two or more low voltage windings of equal voltage and capacity. The normal power transfer of a split transformer is only between the high and low voltage windings. The low voltage winding is typically split into 2 or 4 branches as split windings, with the end-of-line sign being lower case plus a number. The high-voltage winding without splitting consists of two parallel branches, and the line end mark is unchanged. The total capacity of each split winding is the rated capacity of the split transformer.
In this embodiment, when a fault occurs, the split transformer can limit short-circuit current, and when a load or power source connected to one low-voltage winding fails, the other low-voltage windings can still operate normally.
Considering that the ac/dc hybrid micro-grid system may further be provided with a dc lighting system or a dc charging pile, the ac/dc hybrid micro-grid system provided in this embodiment may further include: the direct current-to-direct current converter is connected with the 750V direct current bus 103, and can convert a direct current 750V power supply provided by the 750V direct current bus 103 into a direct current 240V power supply to supply power to a direct current lighting system or a direct current charging pile in the micro-grid system.
It should be noted that, in the present embodiment, the dc-dc converter converts the dc 750V power provided by the 750V dc bus 103 into the dc 240V power, which is merely an example, and in practical application, a person skilled in the art may convert the dc 750V power provided by the 750V dc bus 103 into a suitable power source of a device requiring dc power in the ac-dc hybrid micro-grid system through the dc-dc converter, which is not limited in this embodiment.
In order to further improve the power supply reliability of the ac/dc hybrid micro-grid system provided in this embodiment, various main power supplies may be provided for the 750V dc bus 103, for example, the power may be supplied to the 750V dc bus 103 by using the photovoltaic power generation unit 111 and the wind power generation unit 112.
For example, the ac/dc hybrid micro-grid system provided in this embodiment may further include: a photovoltaic power generation unit 111. The photovoltaic power generation unit 111 is connected to the 750V dc bus 103, and the photovoltaic power generation unit 111 is a second main power supply of the 750V dc bus 103. In addition, the photovoltaic power generation unit 111 may also be connected to the data center 107, and the photovoltaic power generation unit 111 may be a second backup power source for the data center 107.
Specifically, the photovoltaic power generation unit 111 may be connected to the 750V dc bus 103 using a buck dc converter.
For another example, the ac/dc hybrid micro-grid system provided in this embodiment further includes: a wind power generation unit 112. The wind power generation unit 112 may be connected to the 750V dc bus 103, and the wind power generation unit 112 is a third main power supply of the 750V dc bus 103.
Specifically, the ac/dc hybrid micro-grid system provided in this embodiment may further include: the wind power generation unit 112 may be connected to the 750V dc bus 103 via an ac-dc converter.
It should be noted that the connection form of the 750V dc bus 103 may be divided into a monopolar dc bus connection form and a bipolar dc bus connection form.
Specifically, the bipolar direct current bus connection mode is that 3 buses including an anode, a cathode and a zero pole are adopted, a symmetrical structure is adopted, and a power supply and a load are respectively and evenly distributed on the anode bus or the cathode bus. The unipolar direct current bus connection form is 2 buses with positive poles and zero poles.
Because the voltage class requirement of the ac/dc hybrid micro-grid system provided in this embodiment is simple and the capacity is smaller, the 750V dc bus 103 provided in this embodiment may adopt a unipolar dc bus connection mode, so as to achieve the effect of reducing the cost.
Those skilled in the art will appreciate that while some embodiments herein include certain features that are included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An ac/dc hybrid microgrid system, the microgrid system comprising: a section I400V alternating current bus, a section II 400V alternating current bus, a 750V direct current bus, a first station transformer, a second station transformer, an energy storage battery and a data center;
the 750V direct current bus is connected with the data center, or the I section 400V alternating current bus and the II section 400V alternating current bus are connected with the data center;
the I section 400V alternating current bus, the II section 400V alternating current bus and the 750V direct current bus are all connected with the energy storage battery;
the first station is connected with the I section 400V alternating current bus by a transformer, and the second station is connected with the II section 400V alternating current bus by a transformer;
the I section 400V alternating current bus and the II section 400V alternating current bus are both first main power supplies of the data center, the 750V direct current bus is a first standby power supply of the data center, and the energy storage battery is an uninterruptible power supply of the micro-grid system.
2. The microgrid system according to claim 1, further comprising a 10kV ac bus and a 10kV off-site power supply, said first site transformer being connected to said 10kV ac bus, said second site transformer being connected to said 10kV off-site power supply, said first site transformer and said second site transformer becoming mutually redundant site transformers.
3. The micro-grid system according to claim 2, wherein the first station transformer and the second station transformer are both split transformers.
4. The micro-grid system of claim 1, wherein the micro-grid system further comprises: the direct current-to-direct current converter is connected with the 750V direct current bus and converts a direct current 750V power supply provided by the 750V direct current bus into a direct current 240V power supply.
5. The micro-grid system of claim 1, wherein the micro-grid system further comprises: the photovoltaic power generation unit is connected with the 750V direct current bus and is a second main power supply of the 750V direct current bus; the photovoltaic power generation unit is also connected with the data center, and is a second standby power supply of the data center.
6. The micro-grid system of claim 1, wherein the micro-grid system further comprises: and the wind power generation unit is connected with the 750V direct current bus and is a third main power supply of the 750V direct current bus.
7. The micro-grid system of claim 6, wherein the micro-grid system further comprises: and the wind power generation unit is connected with the 750V direct current bus through the alternating current-to-direct current converter.
8. The micro grid system according to claim 1, further comprising a switch, wherein the i-stage 400V ac bus and the ii-stage 400V ac bus are connected to the data center through the switch after being connected, or the 750V dc bus is connected to the data center through the switch, and the switch is used for selecting the first main power supply or the first standby power supply to supply power to the data center.
9. The microgrid system according to claim 8, wherein said first backup power source is in a hot standby state.
10. The microgrid system according to claim 1, wherein said 750V dc bus is in the form of a monopolar dc bus connection.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477521A (en) * | 2023-12-26 | 2024-01-30 | 苏州元脑智能科技有限公司 | Power supply and backup system, power supply and backup control method and data center |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477521A (en) * | 2023-12-26 | 2024-01-30 | 苏州元脑智能科技有限公司 | Power supply and backup system, power supply and backup control method and data center |
| CN117477521B (en) * | 2023-12-26 | 2024-03-22 | 苏州元脑智能科技有限公司 | Power supply and backup system, power supply and backup control method and data center |
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